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For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 Cobalt 🢒 Preface 🢒 Cautions and Notices 🢒 Brake Pressure Modulator Valve Replacement

Brake Pressure Modulator Valve Replacement Without JL4


Object Number: 1843628 Size: MF

Callout

Component Name

Caution: Refer to Brake Fluid Irritant Caution in the Preface section.

Notice: Always connect or disconnect the wiring harness connector from the EBCM/EBTCM with the ignition switch in the OFF position. Failure to observe this precaution could result in damage to the EBCM/EBTCM.

Preliminary Procedures

  1. Turn the ignition switch to the OFF position.
  2. Remove the cover from the engine control module (ECM) and the transmission control module (TCM).
  3. Clean the electronic brake control module (EBCM) to brake pressure modulator valve (BPMV) area and the brake pipe fitting areas of any accumulated dirt and foreign material.

1

Electronic Brake Control Module (EBCM) Electrical Connector

Procedure

Lift the slide lock tabs to release the electrical connector from the EBCM.

2

Electronic Brake Control Module (EBCM)

Procedure

If installing a new BPMV, remove the EBCM. Refer to Electronic Brake Control Module Replacement .

3

Brake Pipe Fitting (Qty: 6)

Notice: Refer to Fastener Notice in the Preface section.

Tighten
19 N·m (14 lb ft)

Procedure

  1. Note the location of the brake pipes before removal to aid installation.
  2. Cap the brake pipe ends and plug the pipe ports on the BPMV to prevent brake fluid loss and contamination.

4

Brake Pressure Modulator Valve (BPMV) to Mounting Bracket Bolt

Tighten
11 N·m (97 lb in)

5

Brake Pressure Modulator Valve (BPMV) Bracket Insulator (Qty: 3)

Tip

    • Inspect the insulators and replace if necessary.
    • Do not remove the BPMV mounting pins unless it is necessary to aid in releasing the modulator assembly from the bracket.

6

Brake Pressure Modulator Valve (BPMV)

Procedure

  1. Do not pry against the accumulator covers on the underside of the brake pressure modulator assembly to release the mounting pins from the bracket insulators.
  2. If installing a new BPMV, install new EBCM to BPMV O-ring seals.
  3. A new BPMV comes with both the primary and secondary circuits pre-filled with brake fluid. If the ignition key has not been cycled after installation, only a base brake bleed is necessary.

    4. Bleed the hydraulic brake system. Refer to Hydraulic Brake System Bleeding .

  4. Perform the Diagnostic System Check - Vehicle .
  5. Observe the brake pedal feel after performing the diagnostic system check. If the pedal now feels spongy, air may have been in or may have been introduced into the secondary hydraulic circuit of the brake modulator which then may have been introduced into the primary circuit.

    6. If the brake pedal feels spongy, perform the Antilock Brake System Automated Bleed Procedure .

Brake Pressure Modulator Valve Replacement With JL4, LNF

Removal Procedure

Caution: Refer to Brake Fluid Irritant Caution in the Preface section.

Notice: Always connect or disconnect the wiring harness connector from the EBCM/EBTCM with the ignition switch in the OFF position. Failure to observe this precaution could result in damage to the EBCM/EBTCM.


    Object Number: 1986367 Size: SH
  1. Turn the ignition switch to the OFF position.
  2. Clean the brake pressure modulator valve (BPMV) brake pipe fitting area of any accumulated dirt and foreign material.
  3. Disconnect the electronic brake control module (EBCM) electrical connector.
  4. Disconnect the LR brake pipe fitting (1) from the BPMV.

    5. Cap the brake pipe fitting and plug the BPMV outlet port to prevent brake fluid loss and contamination.

  5. Disconnect the RR brake pipe fitting (2) from the BPMV.

    6. Cap the brake pipe fitting and plug the BPMV outlet port to prevent brake fluid loss and contamination.


    Object Number: 1986368 Size: SH
  6. Disconnect the LF brake pipe fitting (1) from the BPMV.

    7. Cap the brake pipe fitting and plug the BPMV outlet port to prevent brake fluid loss and contamination.

  7. Disconnect the RF brake pipe fitting (2) from the BPMV.

    8. Cap the brake pipe fitting and plug the BPMV outlet port to prevent brake fluid loss and contamination.


    Object Number: 1986371 Size: SH
  8. Disconnect the master cylinder primary brake pipe fitting (1) from the BPMV.

    9. Cap the brake pipe fitting and plug the BPMV inlet port to prevent brake fluid loss and contamination.

  9. Disconnect the master cylinder secondary brake pipe fitting (2) from the BPMV.

    10. Cap the brake pipe fitting and plug the BPMV inlet port to prevent brake fluid loss and contamination.


    Object Number: 1986374 Size: SH
  10. Remove the BPMV bolt (1).

    11. Object Number: 1986376 Size: SH
  11. Carefully remove the BPMV (1) from the BPMV bracket insulators by pulling straight upward.

    12. Do not pry against the accumulator covers on the underside of the brake modulator assembly to release the mounting pins from the bracket insulators.

Installation Procedure

    Object Number: 1986376 Size: SH
  1. Install the BPMV (1) to the BPMV bracket until the mounting pins are fully inserted in the bracket insulators.

    2. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1986374 Size: SH
  2. Install the BPMV bolt (1).

    3. Tighten
    Tighten the bolt to 11 N·m (97 lb in).


    Object Number: 1986371 Size: SH
  3. Connect the master cylinder primary brake pipe fitting (1) to the BPMV.

    4. Tighten
    Tighten the fitting to 19 N·m (14 lb ft).

  4. Connect the master cylinder secondary brake pipe fitting (2) to the BPMV.

    5. Tighten
    Tighten the fitting to 19 N·m (14 lb ft).


    Object Number: 1986368 Size: SH
  5. Connect the LF brake pipe fitting (1) to the BPMV.

    6. Tighten
    Tighten the fitting to 19 N·m (14 lb ft).

  6. Connect the RF brake pipe fitting (2) to the BPMV.

    7. Tighten
    Tighten the fitting to 19 N·m (14 lb ft).


    Object Number: 1986367 Size: SH
  7. Connect the LR brake pipe fitting (1) to the BPMV.

    8. Tighten
    Tighten the fitting to 19 N·m (14 lb ft).

  8. Connect the RR brake pipe fitting (2) to the BPMV.

    9. Tighten
    Tighten the fitting to 19 N·m (14 lb ft).

  9. Connect the EBCM electrical connector.
  10. Program the EBCM. Refer to Electronic Brake Control Module Programming and Setup.
  11. Bleed the hydraulic brake system. Refer to Hydraulic Brake System Bleeding.
  12. Perform the Diagnostic System Check - Vehicle.
  13. Observe the brake pedal feel after performing the diagnostic system check. If the pedal now feels spongy, air may have been in the secondary hydraulic circuit of the brake modulator which may have been introduced into the primary circuit. If the pedal feels spongy, perform the Antilock Brake System Automated Bleed Procedure.

Brake Pressure Modulator Valve Replacement With JL4

Removal Procedure

Caution: Refer to Brake Fluid Irritant Caution in the Preface section.

Notice: Always connect or disconnect the wiring harness connector from the EBCM/EBTCM with the ignition switch in the OFF position. Failure to observe this precaution could result in damage to the EBCM/EBTCM.


    Object Number: 1986367 Size: SH
  1. Turn the ignition switch to the OFF position.
  2. Remove the cover from the engine control module (ECM) and transmission control module (TCM), if equipped.
  3. Clean the electronic brake control module (EBCM) to brake pressure modulator valve (BPMV) area of any accumulated dirt and foreign material.
  4. Disconnect the electrical connector from the EBCM.
  5. Disconnect the LR brake pipe fitting (1) from the BPMV.

    6. Cap the brake pipe fitting and plug the BPMV outlet port to prevent brake fluid loss and contamination.

  6. Disconnect the RR brake pipe fitting (2) from the BPMV.

    7. Cap the brake pipe fitting and plug the BPMV outlet port to prevent brake fluid loss and contamination.


    Object Number: 1986368 Size: SH
  7. Disconnect the LF brake pipe fitting (1) from the BPMV.

    8. Cap the brake pipe fitting and plug the BPMV outlet port to prevent brake fluid loss and contamination.

  8. Disconnect the RF brake pipe fitting (2) from the BPMV.

    9. Cap the brake pipe fitting and plug the BPMV outlet port to prevent brake fluid loss and contamination.


    Object Number: 1986371 Size: SH
  9. Disconnect the master cylinder primary brake pipe fitting (1) from the BPMV.

    10. Cap the brake pipe fitting and plug the BPMV inlet port to prevent brake fluid loss and contamination.

  10. Disconnect the master cylinder secondary brake pipe fitting (2) from the BPMV.

    11. Cap the brake pipe fitting and plug the BPMV inlet port to prevent brake fluid loss and contamination.


    Object Number: 1986374 Size: SH
  11. Remove the BPMV bolt (1).

    12. Object Number: 1986376 Size: SH
  12. Carefully remove the BPMV (1) from the BPMV bracket insulators by pulling straight upward.

    13. Do not pry against the accumulator covers on the underside of the brake modulator assembly to release the mounting pins from the bracket insulators.

  13. If installing a new BPMV, remove the EBCM. Refer to Electronic Brake Control Module Replacement.

Installation Procedure
  1. If installing a new BPMV, install the EBCM. Refer to Electronic Brake Control Module Replacement.

    2. Object Number: 1986376 Size: SH
  2. Install the BPMV (1) to the BPMV bracket until the mounting pins are fully inserted in the bracket insulators.
  3. If installing a new EBCM, install new O-ring seals.

    4. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1986374 Size: SH
  4. Install the BPMV bolt (1).

    5. Tighten
    Tighten the bolt to 11 N·m (97 lb in).


    Object Number: 1986371 Size: SH
  5. Connect the master cylinder primary brake pipe fitting (1) to the BPMV.

    6. Tighten
    Tighten the fitting to 19 N·m (14 lb ft).

  6. Connect the master cylinder secondary brake pipe fitting (2) to the BPMV.

    7. Tighten
    Tighten the fitting to 19 N·m (14 lb ft).


    Object Number: 1986368 Size: SH
  7. Connect the LF brake pipe fitting (1) to the BPMV.

    8. Tighten
    Tighten the fitting to 19 N·m (14 lb ft).

  8. Connect the RF brake pipe fitting (2) to the BPMV.

    9. Tighten
    Tighten the fitting to 19 N·m (14 lb ft).


    Object Number: 1986367 Size: SH
  9. Connect the LR brake pipe fitting (1) to the BPMV.

    10. Tighten
    Tighten the fitting to 19 N·m (14 lb ft).

  10. Connect the RR brake pipe fitting (2) to the BPMV.

    11. Tighten
    Tighten the fitting to 19 N·m (14 lb ft).

  11. Connect the electrical connector to the EBCM.
  12. Install the cover to the ECM and TCM, if removed.
  13. Bleed the hydraulic brake system. Refer to Hydraulic Brake System Bleeding.
  14. Perform the Diagnostic System Check - Vehicle.
  15. Observe the brake pedal feel after performing the diagnostic system check. If the pedal now feels spongy, air may have been in the secondary hydraulic circuit of the brake modulator which may have been introduced into the primary circuit. If the pedal feels spongy, perform the Antilock Brake System Automated Bleed Procedure.